no variation in rebound (Shiver 45)
 

I have a 2006 GG 250 Marzocchi fork
my weight 85 kg without gear
my Fork specs:

130mm air
4,5N/mm spring
6mm preload
SAE 5 oil

Rebound stack:
21 x 0,1
21 x 0,1
19 x 0,1
19 x 0,1
18 x 0,1
17 x 0,1
15 x 0,1

when I open or close the rebound screw full I don't feel a difference
What is the reason?
Is the thin oil bleed to much beside the first shims.
Is a 22x0.1 Shim better - I want continue to use the SAE5 oil.

Another problem is the fork feels a little bit uptight on the first 3cm.
But the forks are parallel and the srews have right torque.
Why?

this is my rebound stack 07 45mm zokes-22x.20 -21x.30 -20x.30 -19x.30 -17x.30 i use 7wt .43 kg spring 10mm preload

It's very easy to over tighten the triple clamps, i think the spec in the manual is to tight? I made this mistake at first.

I think your have to go heavier with your shim stack with the 5w oil.
I tried 5w, but changed it straight back because I couldn't get any rebound.

1, 22x1.0
2, 21x1.0
3, 19x1.0
4, 19x1.0
5, 18x1.0
6, 17x1.0
7, 15x1.0

This is my rebound stack with 7.5w oil, I run the same spring as you.
And yes, you will need a 22x10 at the top, maybe two with the 5w oil.

I'd be interested to see where you get to with it, keep us informed please.:)

OK I will try the 22 Shim.

When I maintained my fork I notice a different resistance when I push the inner tube in the outer tube.
Have anyone of you experience with "fine" honing of the outer tubes?

Never felt it before, but never really looked. Sorry:confused:

My fork has also a too soft low speed damping.

Just I read an nice article about suspension.
This sentence I found very interesting.
"Oil is such a critical suspension tuning decision that is the first priority to get worked out after spring/sag choice."

Which oil recommends Marzocchi exactly?
Because the SAE weight system has a very broad and vague viscosity range and does not even cover the viscosity range that most quality motorcycle suspension systems require.

Is there any basevalve with a parabolic shape on the market for Shiver 45?

I agree with Nick, I think the 5wt oil is too light. I tried it but swapped back to 7.5wt after one ride. It felt terrible.
I have been shuffling shims in both rebound and compression stacks for the last 12 months and now have something I am happy with. I can post those if you like but mine is an '07, and I believe the size of the bleed holes in the pistons are different than the '06, and the shims you have listed are somewhat different to what I have.
Can someone can confirm there is a difference between '07 and '06 ??

I check the part list 2006 and 2007 there are the same compression (BE250514247) and rebound (BE250514119) pistons.

Which oil recommends Marzocchi?

How can a get more low speed damping?

I'm told the Marzocchi oil is about a 7w. But the closest you can get off the shelf is 7.5w.

You may have a bleed shim, if there is drop that out.

Gasgas may list the same part number, but that doesn't mean it will have the same shim stack or bleed holes drilled, they change things from year to year without much notice, or anything being recorded. Just the Spanish way I guess:rolleyes: .

Does your compression stack still look like this?

11x0.20 < I would remove this.
22x0.10 < maybe double this.
11x0.20
19x0.10
17x0.10
11x0.10
16x0.10
16x0.10
15x0.15
14x0.15
14x0.15
13x0.20
12x0.20

It looks to me that this may be quite heavy on the high speed side, you could change allot of things, but you need to decide what oil weight your going to run, and what area you want to change first.

This is the compression shim stack I run with 7.5w oil, 140mm air gap, 4.5N/mm spring with 0-1mm pre-load.

1, 22x1.0
2, 12x1.0
3, 20x1.0
4, 12x1.0
5, 17x1.0
6, 16x1.0
7, 14x1.0
8, 13x1.0
9, 12x1.0

I am 95kg kitted up, and i'm an average/fast clubman standard rider.

Hope this helps. I'm no expert in this, still learning really.